Sensibly format rows with table name on the right.

[pstop.git] / screen / screen.go

diff --git a/screen/screen.go b/screen/screen.go
index 1490adf..4d40793 100644 (file)
--- a/screen/screen.go
+++ b/screen/screen.go
@@ -19,7 +19,56 @@ type TermboxScreen struct {
        fg, bg        termbox.Attribute
 }
 
-type TermboxAttribute termbox.Attribute
+// print the characters in bold (for headings) but don't print them outside the screen
+func (s *TermboxScreen) BoldPrintAt(x int, y int, text string) {
+       offset := 0
+       for c := range text {
+               if (x + offset) < s.width {
+                       termbox.SetCell(x+offset, y, rune(text[c]), s.fg|termbox.AttrBold, s.bg)
+                       offset++
+               }
+       }
+       s.Flush()
+}
+
+// clear the screen
+func (s *TermboxScreen) Clear() {
+       termbox.Clear(termbox.ColorDefault, termbox.ColorDefault)
+}
+
+// close the screen
+func (s *TermboxScreen) Close() {
+       termbox.Close()
+}
+
+// display a help page
+func (s *TermboxScreen) DisplayHelp() {
+       s.PrintAt(0, 0, lib.MyName()+" version "+version.Version()+" "+lib.Copyright())
+
+       s.PrintAt(0, 2, "Program to show the top I/O information by accessing information from the")
+       s.PrintAt(0, 3, "performance_schema schema. Ideas based on mysql-sys.")
+
+       s.PrintAt(0, 5, "Keys:")
+       s.PrintAt(0, 6, "- - reduce the poll interval by 1 second (minimum 1 second)")
+       s.PrintAt(0, 7, "+ - increase the poll interval by 1 second")
+       s.PrintAt(0, 8, "h/? - this help screen")
+       s.PrintAt(0, 9, "q - quit")
+       s.PrintAt(0, 10, "t - toggle between showing time since resetting statistics or since P_S data was collected")
+       s.PrintAt(0, 11, "z - reset statistics")
+       s.PrintAt(0, 12, "<tab> or <right arrow> - change display modes between: latency, ops, file I/O, lock and user modes")
+       s.PrintAt(0, 13, "<left arrow> - change display modes to the previous screen (see above)")
+       s.PrintAt(0, 15, "Press h to return to main screen")
+}
+
+// flush changes to screen
+func (s *TermboxScreen) Flush() {
+       termbox.Flush()
+}
+
+// return the current height of the screen
+func (s *TermboxScreen) Height() int {
+       return s.height
+}
 
 // reset the termbox to a clear screen
 func (s *TermboxScreen) Initialise() {
@@ -34,19 +83,30 @@ func (s *TermboxScreen) Initialise() {
        s.fg = termbox.ColorDefault
        s.bg = termbox.ColorDefault
 
-       x, y := termbox.Size()
-       s.SetSize(x, y)
+       s.SetSize(termbox.Size())
 }
 
-// clear the screen
-func (s *TermboxScreen) Clear() {
-       termbox.Clear(termbox.ColorWhite, termbox.ColorBlack)
+// print the characters but don't print them outside the screen
+func (s *TermboxScreen) PrintAt(x int, y int, text string) {
+       offset := 0
+       for c := range text {
+               if (x + offset) < s.width {
+                       termbox.SetCell(x+offset, y, rune(text[c]), s.fg, s.bg)
+                       offset++
+               }
+       }
+       s.Flush()
 }
 
-func (s *TermboxScreen) Flush() {
-       termbox.Flush()
+// Clear EOL
+func (s *TermboxScreen) ClearLine(x int, y int) {
+       for i := x; i < s.width; i++ {
+               termbox.SetCell(i, y, ' ', termbox.ColorDefault, termbox.ColorDefault)
+       }
+       s.Flush()
 }
 
+// set the screen size
 func (s *TermboxScreen) SetSize(width, height int) {
        // if we get bigger then clear out the bottom line
        for x := 0; x < s.width; x++ {
@@ -58,43 +118,19 @@ func (s *TermboxScreen) SetSize(width, height int) {
        s.height = height
 }
 
+// return the current (width, height) of the screen
 func (s *TermboxScreen) Size() (int, int) {
        return s.width, s.height
 }
 
-func (s *TermboxScreen) Height() int {
-       return s.height
-}
-
-// print the characters but don't print them outside the screen
-func (s *TermboxScreen) PrintAt(x int, y int, text string) {
-       offset := 0
-       for c := range text {
-               if (x + offset) < s.width {
-                       termbox.SetCell(x+offset, y, rune(text[c]), s.fg, s.bg)
-                       offset++
+// create a channel for termbox.Events and run a poller to send
+// these events to the channel.  Return the channel.
+func (s TermboxScreen) TermBoxChan() chan termbox.Event {
+       termboxChan := make(chan termbox.Event)
+       go func() {
+               for {
+                       termboxChan <- termbox.PollEvent()
                }
-       }
-       s.Flush()
-}
-
-func (s *TermboxScreen) DisplayHelp() {
-       s.PrintAt(0, 0, lib.MyName()+" version "+version.Version()+" (C) 2014 Simon J Mudd <sjmudd@pobox.com>")
-
-       s.PrintAt(0, 2, "Program to show the top I/O information by accessing information from the")
-       s.PrintAt(0, 3, "performance_schema schema. Ideas based on mysql-sys.")
-
-       s.PrintAt(0, 5, "Keys:")
-       s.PrintAt(0, 6, "- - reduce the poll interval by 1 second (minimum 1 second)")
-       s.PrintAt(0, 7, "+ - increase the poll interval by 1 second")
-       s.PrintAt(0, 8, "h - this help screen")
-       s.PrintAt(0, 9, "q - quit")
-       s.PrintAt(0, 10, "t - toggle between showing time since resetting statistics or since P_S data was collected")
-       s.PrintAt(0, 11, "z - reset statistics")
-       s.PrintAt(0, 12, "<tab> - change display modes between: latency, ops, file I/O and lock modes")
-       s.PrintAt(0, 14, "Press h to return to main screen")
-}
-
-func (s *TermboxScreen) Close() {
-       termbox.Close()
+       }()
+       return termboxChan
 }